O Cuisine Rectangular Roaster, 32 x 20cm BORON and TEMPERING ensure a double guarantee of resistance to thermal shock. Superior heat resistance and Superior chemical resistance = Superior quality, Scratch and Stain resistant Borosilicate Glass Rectangular Roaster 12.5 x 7.75 Inch (32x20 Centimeter) Dishwasher safe. Comes with a 5 year manufacturers guarantee. Made in France Prepare, cook, serve, and store in the same cooking vessel. Freezer to oven to table to refrigerator safe, uUse in conventional or microwave ovens The bakeware is made with Borosilicate which is the best glass for cooking in the oven in total safety. Only borosilicate glass can offer both resistance to thermal shock and safety